package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
import java.util.Objects;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "菜品浏览接口")
public class DishController {
    @Autowired
    private DishService dishService;

    @Autowired
    private RedisTemplate redisTemplate;
    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {
        //构造RedisKey
        String key = "category_" + categoryId;
        //查询Redis缓存数据
        ValueOperations valueOperations = redisTemplate.opsForValue();
        List<DishVO> dishes = (List<DishVO>) valueOperations.get(key);
        //若有则直接使用缓存数据
        if(Objects.nonNull(dishes) && !dishes.isEmpty()){
            log.info("返回缓存数据{}",dishes);
            return Result.success(dishes);
        }
        //若无则请求DAO层获取数据，并将数据缓存至Redis
        else{
            Dish dish = new Dish();
            dish.setCategoryId(categoryId);
            dish.setStatus(StatusConstant.ENABLE);//查询起售中的菜品
            dishes = dishService.listWithFlavor(dish);
            valueOperations.set(key,dishes);
            return Result.success(dishes);
        }
    }

}
